pbl_spi_bus_ops Struct Reference

Bus driver operations. More...

#include <spi.h>

Data Fields
int(*	init )(const struct pbl_spi_bus *bus)
	Configure the controller, leaving it disabled.
int(*	configure )(const struct pbl_spi_bus *bus, const struct pbl_spi_dev *dev)
	Set the controller up for dev: the highest supported clock frequency up to dev->max_hz and the mode.
void(*	enable )(const struct pbl_spi_bus *bus)
	Power the controller up.
void(*	disable )(const struct pbl_spi_bus *bus)
	Power the controller down.
int(*	start )(const struct pbl_spi_bus *bus, const struct pbl_spi_xfer *xfer)
	Start a transfer.

Detailed Description

Bus driver operations.

Called with the bus lock held. The class layer owns locking, power, chip selects and the sequence of transfers; the driver moves one transfer over the wire and reports its outcome with pbl_spi_bus_complete().

Field Documentation

configure

int(* pbl_spi_bus_ops::configure) (const struct pbl_spi_bus *bus, const struct pbl_spi_dev *dev)

Set the controller up for dev: the highest supported clock frequency up to dev->max_hz and the mode.

Called before enable(). Returns 0 or a negative errno.

disable

void(* pbl_spi_bus_ops::disable) (const struct pbl_spi_bus *bus)

Power the controller down.

May be called from the controller's interrupt.

enable

void(* pbl_spi_bus_ops::enable) (const struct pbl_spi_bus *bus)

Power the controller up.

init

int(* pbl_spi_bus_ops::init) (const struct pbl_spi_bus *bus)

Configure the controller, leaving it disabled.

Returns 0 or a negative errno.

start

int(* pbl_spi_bus_ops::start) (const struct pbl_spi_bus *bus, const struct pbl_spi_xfer *xfer)

Start a transfer.

Returns 0 if pbl_spi_bus_complete() will be called, or a negative errno. May be called from the controller's interrupt.

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The documentation for this struct was generated from the following file:

• include/pbl/drivers/spi.h